Here is the quote he highlighted:
“What makes two friends feel “close” to one another? I’d argue that a big part of it is the small details that you know about each other. The funny comment your friend made about a billboard they saw while driving down the road, what they had for dinner, a person they ran into on the street, their comments about the movie they saw two nights before. Closeness often comes from knowing the small things, not just the big things”
"It’s also amazing to me that the author never mentioned Twitter. I know it’s written from Google’s perspective, but it’s practically a love letter to Twitter."